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ChangeLog.txt
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ChangeLog.txt
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Breaking changes:
- When the Mosquitto broker is run without configuring any listeners it will
now bind to the loopback interfaces 127.0.0.1 and/or ::1. This means that
only connections from the local host will be possible.
Running the broker as `mosquitto` or `mosquitto -p 1883` will bind to the
loopback interface.
Running the broker with a configuration file with no listeners configured
will bind to the loopback interface with port 1883.
Running the broker with a listener defined will bind by default to `0.0.0.0`
/ `::` and so will be accessible from any interface. It is still possible to
bind to a specific address/interface.
If the broker is run as `mosquitto -c mosquitto.conf -p 1884`, and a
listener is defined in the configuration file, then the port defined on the
command line will be IGNORED, and no listener configured for it.
- All listeners now default to `allow_anonymous false` unless explicitly set
to true in the configuration file. This means that when configuring a
listener the user must either configure an authentication and access control
method, or set `allow_anonymous true`. When the broker is run without a
configured listener, and so binds to the loopback interface, anonymous
connections are allowed.
- The `pid_file` option will now always attempt to write a pid file,
regardless of whether the `-d` argument is used when running the broker.
- The `tls_version` option now defines the *minimum* TLS protocol version to
be used, rather than the exact version. Closes #1258.
Broker:
- When running as root, if dropping privileges to the "mosquitto" user fails,
then try "nobody" instead. This reduces the burden on users installing
Mosquitto themselves.
- Add support for Unix domain socket listeners.
- Add `bridge_outgoing_retain` option, to allow outgoing messages from a
bridge to have the retain bit completely disabled, which is useful when
bridging to e.g. Amazon or Google.
- Add support for MQTT v5 bridges to handle the "retain-available" property
being false.
- Allow MQTT v5.0 outgoing bridges to fall back to MQTT v3.1.1 if connecting
to a v3.x only broker.
- DLT logging is now configurable at runtime with `log_dest dlt`.
Closes #1735.
- Add `mosquitto_plugin_publish()` function, which can be used by plugins to
publish messages.
- Add `mosquitto_client_protocol_version()` function which can be used by
plugins to determine which version of MQTT a client has connected with.
- Send DISCONNECT with `malformed-packet` reason code on invalid PUBLISH,
SUBSCRIBE, and UNSUBSCRIBE packets.
- Add `mosquitto_kick_client_by_clientid()` and `mosquitto_kick_client_by_username()`
functions, which can be used by plugins to disconnect clients.
- Add support for handling $CONTROL/ topics in plugins.
- Add support for PBKDF2-SHA512 password hashing.
- Enabling certificate based TLS encryption is now through certfile and
keyfile, not capath or cafile.
- Added support for controlling UNSUBSCRIBE calls in v5 plugin ACL checks.
- Document that X509_free() must be called after using
mosquitto_client_certificate(). Closes #1842.
- Add "deny" acl type. Closes #1611.
- The broker now sends the receive-maximum property for MQTT v5 CONNACKs.
- mosquitto_password now forbids the : character. Closes #1833.
- Fix `log_timestamp_format` not applying to `log_dest topic`. Closes #1862.
- Add the `bridge_max_packet_size` option. Closes #265.
- Add the `bridge_bind_address` option. Closes #1311.
Client library:
- Client no longer generates random client ids for v3.1.1 clients, these are
now expected to be generated on the broker. This matches the behaviour for
v5 clients. Closes #291.
- Add support for connecting to brokers through Unix domain sockets.
- Add `mosquitto_property_identifier()`, for retrieving the identifier integer
for a property.
- Add `mosquitto_property_identifier_to_string()` for converting a property
identifier integer to the corresponding property name string.
- Add `mosquitto_property_next()` to retrieve the next property in a list, for
iterating over property lists.
- mosquitto_pub now handles the MQTT v5 retain-available property by never
setting the retain bit.
- Added MOSQ_OPT_TCP_NODELAY, to allow disabling Nagle's algorithm on client
sockets. Closes #1526.
- Add `mosquitto_ssl_get()` to allow clients to access their SSL structure and
perform additional verification.
- Fix send quota being incorrecly reset on reconnect. Closes #1822.
- Don't use logging until log mutex is initialised. Closes #1819.
- Fix missing mach/mach_time.h header on OS X. Closes #1831.
- Add MOSQ_OPT_BIND_ADDRESS to allow setting of a bind address independently
of the `mosquitto_connect*()` call.
- Fix connect properties not being sent when the client automatically
reconnects. Closes #1846.
Clients:
- Add timeout return code (27) for `mosquitto_sub -W <secs>` and
`mosquitto_rr -W <secs>`. Closes #275.
- Add support for connecting to brokers through Unix domain sockets with the
`--unix` argument.
- Use cJSON library for producing JSON output, where available. Closes #1222.
- Add support for outputting MQTT v5 property information to mosquitto_sub/rr
JSON output. Closes #1416.
- Add `--pretty` option to mosquitto_sub/rr for formatted/unformatted JSON
output.
- Add support for v5 property printing to mosquitto_sub/rr in non-JSON mode.
Closes #1416.
- mosquitto_sub will now exit if all subscriptions were denied.
- Add `--nodelay` to all clients to allow them to use the MOSQ_OPT_TCP_NODELAY
option.
- Add `-x` to all clients to all the session-expiry-interval property to be
easily set for MQTT v5 clients.
- Add `--random-filter` to mosquitto_sub, to allow only a certain proportion
of received messages to be printed.
- mosquitto_sub %j and %J timestamps are now in a ISO 8601 compatible format.
- mosquitto_pub now sends 0 length files without an error when using `-f`.
- mosquitto_sub now supports extra format specifiers for field width and
precision for some parameters.
- Add `--version` for all clients.
1.6.12 - 2020-08-19
===================
Security:
- In some circumstances, Mosquitto could leak memory when handling PUBLISH
messages. This is limited to incoming QoS 2 messages, and is related
to the combination of the broker having persistence enabled, a clean
session=false client, which was connected prior to the broker restarting,
then has reconnected and has now sent messages at a sufficiently high rate
that the incoming queue at the broker has filled up and hence messages are
being dropped. This is more likely to have an effect where
max_queued_messages is a small value. This has now been fixed. Closes #1793.
Broker:
- Build warning fixes when building with WITH_BRIDGE=no and WITH_TLS=no.
Clients:
- All clients exit with an error exit code on CONNACK failure. Closes #1778.
- Don't busy loop with `mosquitto_pub -l` on a slow connection.
1.6.11 - 2020-08-11
===================
Security:
- On Windows the Mosquitto service was being installed without appropriate
path quoting, this has been fixed.
Broker:
- Fix usage message only mentioning v3.1.1. Closes #1713.
- Fix broker refusing to start if only websockets listeners were defined.
Closes #1740.
- Change systemd unit files to create /var/log/mosquitto before starting.
Closes #821.
- Don't quit with an error if opening the log file isn't possible.
Closes #821.
- Fix bridge topic remapping when using "" as the topic. Closes #1749.
- Fix messages being queued for disconnected bridges when clean start was
set to true. Closes #1729.
- Fix `autosave_interval` not being triggered by messages being delivered.
Closes #1726.
- Fix websockets clients sometimes not being disconnected promptly.
Closes #1718.
- Fix "slow" file based logging by switching to line based buffering.
Closes #1689. Closes #1741.
- Log protocol error message where appropriate from a bad UNSUBSCRIBE, rather
than the generic "socket error".
- Don't try to start DLT logging if DLT unavailable, to avoid a long delay
when shutting down the broker. Closes #1735.
- Fix potential memory leaks. Closes #1773. Closes #1774.
- Fix clients not receiving messages after a previous client with the same
client ID and positive will delay interval quit. Closes #1752.
- Fix overly broad HAVE_PTHREAD_CANCEL compile guard. Closes #1547.
Client library:
- Improved documentation around connect callback return codes. Close #1730.
- Fix `mosquitto_publish*()` no longer returning `MOSQ_ERR_NO_CONN` when not
connected. Closes #1725.
- `mosquitto_loop_start()` now sets a thread name on Linux, FreeBSD, NetBSD,
and OpenBSD. Closes #1777.
- Fix `mosquitto_loop_stop()` not stopping on Windows. Closes #1748. Closes #117.
1.6.10 - 2020-05-25
===================
Broker:
- Report invalid bridge prefix+pattern combinations at config parsing time
rather than letting the bridge fail later. Issue #1635.
- Fix `mosquitto_passwd -b` not updating passwords for existing users
correctly. Creating a new user with `-b` worked without problem.
Closes #1664.
- Fix memory leak when connecting clients rejected.
- Don't disconnect clients that are already disconnected. This prevents the
session expiry being extended on SIGHUP. Closes #1521.
- Fix support for openssl 3.0.
- Fix check when loading persistence file of a different version than the
native version. Closes #1684.
- Fix possible assert crash associated with bridge reconnecting when compiled
without epoll support. Closes #1700.
Client library:
- Don't treat an unexpected PUBACK, PUBREL, or PUBCOMP as a fatal error.
Issue #1629.
- Fix support for openssl 3.0.
- Fix memory leaks from multiple calls to
`mosquitto_lib_init()`/`mosquitto_lib_cleanup()`. Closes #1691.
- Fix documentation on return code of `mosquitto_lib_init()` for Windows.
Closes #1690.
Clients:
- Fix mosquitto_sub %j or %J not working on Windows. Closes #1674.
Build:
- Various fixes for building with <C99 support. Closes #1622.
- Fix use of sed on BSD. Closes #1614.
1.6.9 - 20200227
================
Broker:
- Fix session expiry with very large expiry intervals. Closes #1525.
- Check ACL patterns for validity when loading. Closes #1539.
- Use presence of password file as indicator for whether username checks
should take place, not whether usernames are defined in the password file.
Closes #1545.
- Strip whitespace from end of config file string options. Closes #1566.
- Satisfy valgrind when exiting on error due to not being able to open a
listening socket, by calling freeaddrinfo. Closes #1565.
- Fix config->user not being freed on exit. Closes #1564.
- Fix trailing whitespace not being trimmed on acl users. Closes #1539.
- Fix `bind_interface` not working for the default listener. Closes #1533.
- Improve password file parsing in the broker and mosqitto_passwd. Closes #1584.
- Print OpenSSL errors in more situations, like when loading certificates
fails. Closes #1552.
- Fix `mosquitto_client_protocol() returning incorrect values.
Client library:
- Set minimum keepalive argument to `mosquitto_connect*()` to be 5 seconds.
Closes #1550.
- Fix `mosquitto_topic_matches_sub()` not returning MOSQ_ERR_INVAL if the
topic contains a wildcard. Closes #1589.
Clients:
- Fix `--remove-retained` not obeying the `-T` option for filtering out
topics. Closes #1585.
- Default behaviour for v5 clients using `-c` is now to use infinite length
sessions, as with v3 clients. Closes #1546.
1.6.8 - 20191128
================
Broker:
- Various fixes for `allow_zero_length_clientid` config, where this option was
not being set correctly. Closes #1429.
- Fix incorrect memory tracking causing problems with memory_limit option.
Closes #1437.
- Fix subscription topics being limited to 200 characters instead of 200
hierarchy levels. Closes #1441.
- Only a single CRL could be loaded at once. This has been fixed.
Closes #1442.
- Fix problems with reloading config when `per_listener_settings` was true.
Closes #1459.
- Fix retained messages with an expiry interval not being expired after being
restored from persistence. Closes #1464.
- Fix messages with an expiry interval being sent without an expiry interval
property just before they were expired. Closes #1464.
- Fix TLS Websockets clients not receiving messages after taking over a
previous connection. Closes #1489.
- Fix MQTT 3.1.1 clients using clean session false, or MQTT 5.0 clients using
session-expiry-interval set to infinity never expiring, even when the global
`persistent_client_expiration` option was set. Closes #1494.
Client library:
- Fix publish properties not being passed to on_message_v5 callback for QoS 2
messages. Closes #1432.
- Fix documentation issues in mosquitto.h. Closes #1478.
- Document `mosquitto_connect_srv()`. Closes #1499.
Clients:
- Fix duplicate cfg definition in rr_client. Closes #1453.
- Fix `mosquitto_pub -l` hang when stdin stream ends. Closes #1448.
- Fix `mosquitto_pub -l` not sending the final line of stdin if it does not
end with a new line. Closes #1473.
- Make documentation for `mosquitto_pub -l` match reality - blank lines are
sent as empty messages. Closes #1474.
- Free memory in `mosquitto_sub` when quiting without having made a successful
connection. Closes #1513.
Build:
- Added `CLIENT_STATIC_LDADD` to makefile builds to allow more libraries to be
linked when compiling the clients with a static libmosquitto, as required
for e.g. openssl on some systems.
Installer:
- Fix mosquitto_rr.exe not being included in Windows installers. Closes #1463.
1.6.7 - 20190925
================
Broker:
- Add workaround for working with libwebsockets 3.2.0.
- Fix potential crash when reloading config. Closes #1424, #1425.
Client library:
- Don't use `/` in autogenerated client ids, to avoid confusing with topics.
- Fix `mosquitto_max_inflight_messages_set()` and `mosquitto_int_option(...,
MOSQ_OPT_*_MAX, ...)` behaviour. Closes #1417.
- Fix regression on use of `mosquitto_connect_async()` not working.
Closes #1415 and #1422.
Clients:
- mosquitto_sub: Fix `-E` incorrectly not working unless `-d` was also
specified. Closes #1418.
- Updated documentation around automatic client ids.
1.6.6 - 20190917
================
Security:
- Restrict topic hierarchy to 200 levels to prevent possible stack overflow.
Closes #1412.
Broker:
- Restrict topic hierarchy to 200 levels to prevent possible stack overflow.
Closes #1412.
- mosquitto_passwd now returns 1 when attempting to update a user that does
not exist. Closes #1414.
1.6.5 - 20190912
================
Broker:
- Fix v5 DISCONNECT packets with remaining length == 2 being treated as a
protocol error. Closes #1367.
- Fix support for libwebsockets 3.x.
- Fix slow websockets performance when sending large messages. Closes #1390.
- Fix bridges potentially not connecting on Windows. Closes #478.
- Fix clients authorised using `use_identity_as_username` or
`use_subject_as_username` being disconnected on SIGHUP. Closes #1402.
- Improve error messages in some situations when clients disconnect. Reduces
the number of "Socket error on client X, disconnecting" messages.
- Fix Will for v5 clients not being sent if will delay interval was greater
than the session expiry interval. Closes #1401.
- Fix CRL file not being reloaded on HUP. Closes #35.
- Fix repeated "Error in poll" messages on Windows when only websockets
listeners are defined. Closes #1391.
Client library:
- Fix reconnect backoff for the situation where connections are dropped rather
than refused. Closes #737.
- Fix missing locks on `mosq->state`. Closes #1374.
Documentation:
- Improve details on global/per listener options in the mosquitto.conf man page.
Closes #274.
- Clarify behaviour when clients exceed the `message_size_limit`. Closes #448.
- Improve documentation for `max_inflight_bytes`, `max_inflight_messages`,
and `max_queued_messages`.
Build:
- Fix missing function warnings on NetBSD.
- Fix WITH_STATIC_LIBRARIES using CMake on Windows. Closes #1369.
- Guard ssize_t definition on Windows. Closes #522.
1.6.4 - 20190801
================
Broker:
- Fix persistent clients being incorrectly expired on Raspberry Pis.
Closes #1272.
- Windows: Allow other applications access to the log file when running.
Closes #515.
- Fix incoming QoS 2 messages being blocked when `max_inflight_messages` was
set to 1. Closes #1332.
- Fix incoming messages not being removed for a client if the topic being
published to does not have any subscribers. Closes #1322.
Client library:
- Fix MQTT v5 subscription options being incorrectly set for MQTT v3
subscriptions. Closes #1353.
- Make behaviour of `mosquitto_connect_async()` consistent with
`mosquitto_connect()` when connecting to a non-existent server.
Closes #1345.
- `mosquitto_string_option(mosq, MOSQ_OPT_TLS_KEYFORM, ...)` was incorrectly
returning `MOSQ_ERR_INVAL` with valid input. This has been fixed.
Closes #1360.
- on_connect callback is now called with the correct v5 reason code if a v5
client connects to a v3.x broker and is sent a CONNACK with the
"unacceptable protocol version" connack reason code.
- Fix memory leak when setting v5 properties in mosquitto_connect_v5().
- Fix properties not being sent on QoS>0 PUBLISH messages.
Clients:
- mosquitto_pub: fix error codes not being returned when mosquitto_pub exits.
Closes #1354.
- All clients: improve error messages when connecting to a v3.x broker when in
v5 mode. Closes #1344.
Other:
- Various documentation fixes.
1.6.3 - 20190618
================
Broker:
- Fix detection of incoming v3.1/v3.1.1 bridges. Closes #1263.
- Fix default max_topic_alias listener config not being copied to the in-use
listener when compiled without TLS support.
- Fix random number generation if compiling using `WITH_TLS=no` and on Linux
with glibc >= 2.25. Without this fix, no random numbers would be generated
for e.g. on broker client id generation, and so clients connecting expecting
this feature would be unable to connect.
- Fix compilation problem related to `getrandom()` on non-glibc systems.
- Fix Will message for a persistent client incorrectly being sent when the
client reconnects after a clean disconnect. Closes #1273.
- Fix Will message for a persistent client not being sent on disconnect.
Closes #1273.
- Improve documentation around the upgrading of persistence files. Closes
#1276.
- Add 'extern "C"' on mosquitto_broker.h and mosquitto_plugin.h for C++ plugin
writing. Closes #1290.
- Fix persistent Websockets clients not receiving messages after they
reconnect, having sent DISCONNECT on a previous session. Closes #1227.
- Disable TLS renegotiation. Client initiated renegotiation is considered to
be a potential attack vector against servers. Closes #1257.
- Fix incorrect shared subscription topic '$shared'.
- Fix zero length client ids being rejected for MQTT v5 clients with clean
start set to true.
- Fix MQTT v5 overlapping subscription behaviour. Clients now receive message
from all matching subscriptions rather than the first one encountered, which
ensures the maximum QoS requirement is met.
- Fix incoming/outgoing quota problems for QoS>0.
- Remove obsolete `store_clean_interval` from documentation.
- Fix v4 authentication plugin never calling psk_key_get.
Client library:
- Fix typo causing build error on Windows when building without TLS support.
Closes #1264.
Clients:
- Fix -L url parsing when `/topic` part is missing.
- Stop some error messages being printed even when `--quiet` was used.
Closes #1284.
- Fix mosquitto_pub exiting with error code 0 when an error occurred.
Closes #1285.
- Fix mosquitto_pub not using the `-c` option. Closes #1273.
- Fix MQTT v5 clients not being able to specify a password without a username.
Closes #1274.
- Fix `mosquitto_pub -l` not handling network failures. Closes #1152.
- Fix `mosquitto_pub -l` not handling zero length input. Closes #1302.
- Fix double free on exit in mosquitto_pub. Closes #1280.
Documentation:
- Remove references to Python binding and C++ wrapper in libmosquitto man
page. Closes #1266.
Build:
- CLIENT_LDFLAGS now uses LDFLAGS. Closes #1294.
1.6.2 - 20190430
================
Broker:
- Fix memory access after free, leading to possible crash, when v5 client with
Will message disconnects, where the Will message has as its first property
one of `content-type`, `correlation-data`, `payload-format-indicator`, or
`response-topic`. Closes #1244.
- Fix build for WITH_TLS=no. Closes #1250.
- Fix Will message not allowing user-property properties.
- Fix broker originated messages (e.g. $SYS/broker/version) not being
published when `check_retain_source` set to true. Closes #1245.
- Fix $SYS/broker/version being incorrectly expired after 60 seconds.
Closes #1245.
Library:
- Fix crash after client has been unable to connect to a broker. This occurs
when the client is exiting and is part of the final library cleanup routine.
Closes #1246.
Clients:
- Fix -L url parsing. Closes #1248.
1.6.1 - 20190426
================
Broker:
- Document `memory_limit` option.
Clients:
- Fix compilation on non glibc systems due to missing sys/time.h header.
Build:
- Add `make check` target and document testing procedure. Closes #1230.
- Document bundled dependencies and how to disable. Closes #1231.
- Split CFLAGS and CPPFLAGS, and LDFLAGS and LDADD/LIBADD.
- test/unit now respects CPPFLAGS and LDFLAGS. Closes #1232.
- Don't call ldconfig in CMake scripts. Closes #1048.
- Use CMAKE_INSTALL_* variables when installing in CMake. Closes #1049.
1.6 - 20190417
==============
Broker features:
- Add support for MQTT v5
- Add support for OCSP stapling.
- Add support for ALPN on bridge TLS connections. Closes #924.
- Add support for Automotive DLT logging.
- Add TLS Engine support.
- Persistence file read/write performance improvements.
- General performance improvements.
- Add max_keepalive option, to allow a maximum keepalive value to be set for
MQTT v5 clients only.
- Add `bind_interface` option which allows a listener to be bound to a
specific network interface, in a similar fashion to the `bind_address` option.
Linux only.
- Add improved bridge restart interval based on Decorrelated Jitter.
- Add `dhparamfile` option, to allow DH parameters to be loaded for Ephemeral
DH support
- Disallow writing to $ topics where appropriate.
- Fix mosquitto_passwd crashing on corrupt password file. Closes #1207.
- Add explicit support for TLS v1.3.
- Drop support for TLS v1.0.
- Improved general support for broker generated client ids. Removed libuuid
dependency.
- auto_id_prefix now defaults to 'auto-'.
- QoS 1 and 2 flow control improvements.
Client library features:
- Add support for MQTT v5
- Add mosquitto_subscribe_multiple() for sending subscriptions to multiple
topics in one command.
- Add TLS Engine support.
- Add explicit support for TLS v1.3.
- Drop support for TLS v1.0.
- QoS 1 and 2 flow control improvements.
Client features:
- Add support for MQTT v5
- Add mosquitto_rr client, which can be used for "request-response" messaging,
by sending a request message and awaiting a response.
- Add TLS Engine support.
- Add support for ALPN on TLS connections. Closes #924.
- Add -D option for all clients to specify MQTT v5 properties.
- Add -E to mosquitto_sub, which causes it to exit immediately after having
its subscriptions acknowledged. Use with -c to create a durable client
session without requiring a message to be received.
- Add --remove-retained to mosquitto_sub, which can be used to clear retained
messages on a broker.
- Add --repeat and --repeat-delay to mosquitto_pub, which can be used to
repeat single message publishes at a regular interval.
- -V now accepts `5, `311`, `31`, as well as `mqttv5` etc.
- Add explicit support for TLS v1.3.
- Drop support for TLS v1.0.
Broker fixes:
- Improve error reporting when creating listeners.
- Fix build on SmartOS due to missing IPV6_V6ONLY. Closes #1212.
Client library fixes
- Add missing `mosquitto_userdata()` function.
Client fixes:
- mosquitto_pub wouldn't always publish all messages when using `-l` and
QoS>0. This has been fixed.
- mosquitto_sub was incorrectly encoding special characters when using %j
output format. Closes #1220.
1.5.8 - 20190228
================
Broker:
- Fix clients being disconnected when ACLs are in use. This only affects the
case where a client connects using a username, and the anonymous ACL list is
defined but specific user ACLs are not defined. Closes #1162.
- Make error messages for missing config file clearer.
- Fix some Coverity Scan reported errors that could occur when the broker was
already failing to start.
- Fix broken mosquitto_passwd on FreeBSD. Closes #1032.
- Fix delayed bridge local subscriptions causing missing messages.
Closes #1174.
Library:
- Use higher resolution timer for random initialisation of client id
generation. Closes #1177.
- Fix some Coverity Scan reported errors that could occur when the library was
already quitting.
1.5.7 - 20190213
================
Broker:
- Fix build failure when using WITH_ADNS=yes
- Ensure that an error occurs if `per_listener_settings true` is given after
other security options. Closes #1149.
- Fix include_dir not sorting config files before loading. This was partially
fixed in 1.5 previously.
- Improve documentation around the `include_dir` option. Closes #1154.
- Fix case where old unreferenced msg_store messages were being saved to the
persistence file, bloating its size unnecessarily. Closes #389.
Library:
- Fix `mosquitto_topic_matches_sub()` not returning MOSQ_ERR_INVAL for
invalid subscriptions like `topic/#abc`. This only affects the return value,
not the match/no match result, which was already correct.
Build:
- Don't require C99 compiler.
- Add rewritten build test script and remove some build warnings.
1.5.6 - 20190206
================
Security:
- CVE-2018-12551: If Mosquitto is configured to use a password file for
authentication, any malformed data in the password file will be treated as
valid. This typically means that the malformed data becomes a username and no
password. If this occurs, clients can circumvent authentication and get access
to the broker by using the malformed username. In particular, a blank line
will be treated as a valid empty username. Other security measures are
unaffected. Users who have only used the mosquitto_passwd utility to create
and modify their password files are unaffected by this vulnerability.
Affects version 1.0 to 1.5.5 inclusive.
- CVE-2018-12550: If an ACL file is empty, or has only blank lines or
comments, then mosquitto treats the ACL file as not being defined, which
means that no topic access is denied. Although denying access to all topics
is not a useful configuration, this behaviour is unexpected and could lead
to access being incorrectly granted in some circumstances. This is now
fixed. Affects versions 1.0 to 1.5.5 inclusive.
- CVE-2018-12546. If a client publishes a retained message to a topic that
they have access to, and then their access to that topic is revoked, the
retained message will still be delivered to future subscribers. This
behaviour may be undesirable in some applications, so a configuration option
`check_retain_source` has been introduced to enforce checking of the
retained message source on publish.
Broker:
- Fixed comment handling for config options that have optional arguments.
- Improved documentation around bridge topic remapping.
- Handle mismatched handshakes (e.g. QoS1 PUBLISH with QoS2 reply) properly.
- Fix spaces not being allowed in the bridge remote_username option. Closes
#1131.
- Allow broker to always restart on Windows when using `log_dest file`. Closes
#1080.
- Fix Will not being sent for Websockets clients. Closes #1143.
- Windows: Fix possible crash when client disconnects. Closes #1137.
- Fixed durable clients being unable to receive messages when offline, when
per_listener_settings was set to true. Closes #1081.
- Add log message for the case where a client is disconnected for sending a
topic with invalid UTF-8. Closes #1144.
Library:
- Fix TLS connections not working over SOCKS.
- Don't clear SSL context when TLS connection is closed, meaning if a user
provided an external SSL_CTX they have less chance of leaking references.
Build:
- Fix comparison of boolean values in CMake build. Closes #1101.
- Fix compilation when openssl deprecated APIs are not available.
Closes #1094.
- Man pages can now be built on any system. Closes #1139.
1.5.5 - 20181211
================
Security:
- If `per_listener_settings` is set to true, then the `acl_file` setting was
ignored for the "default listener" only. This has been fixed. This does not
affect any listeners defined with the `listener` option. Closes #1073.
This is now tracked as CVE-2018-20145.
Broker:
- Add `socket_domain` option to allow listeners to disable IPv6 support.
This is required to work around a problem in libwebsockets that means
sockets only listen on IPv6 by default if IPv6 support is compiled in.
Closes #1004.
- When using ADNS, don't ask for all network protocols when connecting,
because this can lead to confusing "Protocol not supported" errors if the
network is down. Closes #1062.
- Fix outgoing retained messages not being sent by bridges on initial
connection. Closes #1040.
- Don't reload auth_opt_ options on reload, to match the behaviour of the
other plugin options. Closes #1068.
- Print message on error when installing/uninstalling as a Windows service.
- All non-error connect/disconnect messages are controlled by the
`connection_messages` option. Closes #772. Closes #613. Closes #537.
Library:
- Fix reconnect delay backoff behaviour. Closes #1027.
- Don't call on_disconnect() twice if keepalive tests fail. Closes #1067.
Client:
- Always print leading zeros in mosquitto_sub when output format is hex.
Closes #1066.
Build:
- Fix building where TLS-PSK is not available. Closes #68.
1.5.4 - 20181108
================
Security:
- When using a TLS enabled websockets listener with "require_certificate"
enabled, the mosquitto broker does not correctly verify client certificates.
This is now fixed. All other security measures operate as expected, and in
particular non-websockets listeners are not affected by this. Closes #996.
Broker:
- Process all pending messages even when a client has disconnected. This means
a client that send a PUBLISH then DISCONNECT quickly, then disconnects will
have its DISCONNECT message processed properly and so no Will will be sent.
Closes #7.
- $SYS/broker/clients/disconnected should never be negative. Closes #287.
- Give better error message if a client sends a password without a username.
Closes #1015.
- Fix bridge not honoring restart_timeout. Closes #1019.
- Don't disconnect a client if an auth plugin denies access to SUBSCRIBE.
Closes #1016.
Library:
- Fix memory leak that occurred if mosquitto_reconnect() was used when TLS
errors were present. Closes #592.
- Fix TLS connections when using an external event loop with
mosquitto_loop_read() and mosquitto_write(). Closes #990.
Build:
- Fix clients not being compiled with threading support when using CMake.
Closes #983.
- Header fixes for FreeBSD. Closes #977.
- Use _GNU_SOURCE to fix build errors in websockets and getaddrinfo usage.
Closes #862 and #933.
- Fix builds on QNX 7.0.0. Closes #1018.
1.5.3 - 20180925
================
Security:
- Fix CVE-2018-12543. If a message is sent to Mosquitto with a topic that
begins with $, but is not $SYS, then an assert that should be unreachable is
triggered and Mosquitto will exit.
Broker:
- Elevate log level to warning for situation when socket limit is hit.
- Remove requirement to use `user root` in snap package config files.
- Fix retained messages not sent by bridges on outgoing topics at the first
connection. Closes #701.
- Documentation fixes. Closes #520, #600.
- Fix duplicate clients being added to by_id hash before the old client was
removed. Closes #645.
- Fix Windows version not starting if include_dir did not contain any files.
Closes #566.
- When an authentication plugin denied access to a SUBSCRIBE, the client would
be disconnected incorrectly. This has been fixed. Closes #1016.
Build:
- Various fixes to ease building.
1.5.2 - 20180919
================
Broker:
- Fix build when using WITH_ADNS=yes.
- Fix incorrect call to setsockopt() for TCP_NODELAY. Closes #941.
- Fix excessive CPU usage when the number of sockets exceeds the system limit.
Closes #948.
- Fix for bridge connections when using WITH_ADNS=yes.
- Fix round_robin false behaviour. Closes #481.
- Fix segfault on HUP when bridges and security options are configured.
Closes #965.
Library:
- Fix situation where username and password is used with SOCKS5 proxy. Closes
#927.
- Fix SOCKS5 behaviour when passing IP addresses. Closes #927.
Build:
- Make it easier to build without bundled uthash.h using "WITH_BUNDLED_DEPS=no".
- Fix build with OPENSSL_NO_ENGINE. Closes #932.
1.5.1 - 20180816
================
Broker:
- Fix plugin cleanup function not being called on exit of the broker.
Closes #900.
- Print more OpenSSL errors when loading certificates/keys fail.
- Use AF_UNSPEC etc. instead of PF_UNSPEC to comply with POSIX. Closes #863.
- Remove use of AI_ADDRCONFIG, which means the broker can be used on systems
where only the loopback interface is defined. Closes #869, Closes #901.
- Fix IPv6 addresses not being able to be used as bridge addresses.
Closes #886.
- All clients now time out if they exceed their keepalive*1.5, rather than
just reach it. This was inconsistent in two places.
- Fix segfault on startup if bridge CA certificates could not be read.
Closes #851.
- Fix problem opening listeners on Pi caused by unsigned char being default.
Found via #849.
- ACL patterns that do not contain either %c or %u now produce a warning in
the log. Closes #209.
- Fix bridge publishing failing when per_listener_settings was true. Closes
#860.
- Fix `use_identity_as_username true` not working. Closes #833.
- Fix UNSUBACK messages not being logged. Closes #903.
- Fix possible endian issue when reading the `memory_limit` option.
- Fix building for libwebsockets < 1.6.
- Fix accessor functions for username and client id when used in plugin auth
check.
Library:
- Fix some places where return codes were incorrect, including to the
on_disconnect() callback. This has resulted in two new error codes,
MOSQ_ERR_KEEPALIVE and MOSQ_ERR_LOOKUP.
- Fix connection problems when mosquitto_loop_start() was called before
mosquitto_connect_async(). Closes #848.
Clients:
- When compiled using WITH_TLS=no, the default port was incorrectly being set
to -1. This has been fixed.
- Fix compiling on Mac OS X <10.12. Closes #813 and #240.
Build:
- Fixes for building on NetBSD. Closes #258.
- Fixes for building on FreeBSD.
- Add support for compiling with static libwebsockets library.
1.5 - 20180502
==============
Security:
- Fix memory leak that could be caused by a malicious CONNECT packet. This
does not yet have a CVE assigned. Closes #533493 (on Eclipse bugtracker)
Broker features:
- Add per_listener_settings to allow authentication and access control to be
per listener.
- Add limited support for reloading listener settings. This allows settings
for an already defined listener to be reloaded, but port numbers must not be
changed.
- Add ability to deny access to SUBSCRIBE messages as well as the current
read/write accesses. Currently for auth plugins only.
- Reduce calls to malloc through the use of UHPA.
- Outgoing messages with QoS>1 are no longer retried after a timeout period.
Messages will be retried when a client reconnects. This change in behaviour
can be justified by considering when the timeout may have occurred.
* If a connection is unreliable and has dropped, but without one end
noticing, the messages will be retried on reconnection. Sending
additional PUBLISH or PUBREL would not have changed anything.
* If a client is overloaded/unable to respond/has a slow connection then
sending additional PUBLISH or PUBREL would not help the client catch
up. Once the backlog has cleared the client will respond. If it is not
able to catch up, sending additional duplicates would not help either.
- Add use_subject_as_username option for certificate based client
authentication to use the entire certificate subject as a username, rather
than just the CN. Closes #469467.
- Change sys tree printing output. This format shouldn't be relied upon and
may change at any time. Closes #470246.
- Minimum supported libwebsockets version is now 1.3.
- Add systemd startup notification and services. Closes #471053.
- Reduce unnecessary malloc and memcpy when receiving a message and storing
it. Closes #470258.
- Support for Windows XP has been dropped.
- Bridge connections now default to using MQTT v3.1.1.
- mosquitto_db_dump tool can now output some stats on clients.
- Perform utf-8 validation on incoming will, subscription and unsubscription
topics.
- new $SYS/broker/store/messages/count (deprecates $SYS/broker/messages/stored)
- new $SYS/broker/store/messages/bytes
- max_queued_bytes feature to limit queues by real size rather than
than just message count. Closes Eclipse #452919 or Github #100
- Add support for bridges to be configured to only send notifications to the
local broker.
- Add set_tcp_nodelay option to allow Nagle's algorithm to be disabled on
client sockets. Closes #433.
- The behaviour of allow_anonymous has changed. In the old behaviour, the
default if not set was to allow anonymous access. The new behaviour is to
default is to allow anonymous access unless another security option is set.
For example, if password_file is set and allow_anonymous is not set, then
anonymous access will be denied. It is still possible to allow anonymous
access by setting it explicitly.
Broker fixes:
- Fix UNSUBSCRIBE with no topic is accepted on MQTT 3.1.1. Closes #665.
- Produce an error if two bridges share the same local_clientid.
- Miscellaneous fixes on Windows.
- queue_qos0_messages was not observing max_queued_** limits
- When using the include_dir configuration option sort the files
alphabetically before loading them. Closes #17.
- IPv6 is no longer disabled for websockets listeners.
- Remove all build timestamp information including $SYS/broker/timestamp.
Close #651.
- Correctly handle incoming strings that contain a NULL byte. Closes #693.
- Use constant time memcmp for password comparisons.
- Fix incorrect PSK key being used if it had leading zeroes.
- Fix memory leak if a client provided a username/password for a listener with
use_identity_as_username configured.
- Fix use_identity_as_username not working on websockets clients.
- Don't crash if an auth plugin returns MOSQ_ERR_AUTH for a username check on
a websockets client. Closes #490.
- Fix 08-ssl-bridge.py test when using async dns lookups. Closes #507.
- Lines in the config file are no longer limited to 1024 characters long.
Closes #652.
- Fix $SYS counters of messages and bytes sent when message is sent over
a Websockets. Closes #250.
- Fix upgrade_outgoing_qos for retained message. Closes #534.
- Fix CONNACK message not being sent for unauthorised connect on websockets.
Closes #8.
- Maximum connections on Windows increased to 2048.
- When a client with an in-use client-id connects, if the old client has a
will, send the will message. Closes #26.
- Fix parsing of configuration options that end with a space. Closes #804.
Client library features:
- Outgoing messages with QoS>1 are no longer retried after a timeout period.
Messages will be retried when a client reconnects.
- DNS-SRV support is now disabled by default.
- Add mosquitto_subscribe_simple() This is a helper function to make
retrieving messages from a broker very straightforward. Examples of its use
are in examples/subscribe_simple.
- Add mosquitto_subscribe_callback() This is a helper function to make
processing messages from a broker very straightforward. An example of its use
is in examples/subscribe_simple.
- Connections now default to using MQTT v3.1.1.
- Add mosquitto_validate_utf8() to check whether a string is valid UTF-8
according to the UTF-8 spec and to the additional restrictions imposed by
the MQTT spec.
- Topic inputs are checked for UTF-8 validity.
- Add mosquitto_userdata function to allow retrieving the client userdata
member variable. Closes #111.
- Add mosquitto_pub_topic_check2(), mosquitto_sub_topic_check2(), and
mosquitto_topic_matches_sub2() which are identical to the similarly named
functions but also take length arguments.
- Add mosquitto_connect_with_flags_callback_set(), which allows a second
connect callback to be used which also exposes the connect flags parameter.
Closes #738 and #128.
- Add MOSQ_OPT_SSL_CTX option to allow a user specified SSL_CTX to be used
instead of the one generated by libmosquitto. This allows greater control
over what options can be set. Closes #715.
- Add MOSQ_OPT_SSL_CTX_WITH_DEFAULTS to work with MOSQ_OPT_SSL_CTX and have
the default libmosquitto SSL_CTX configuration applied to the user provided
SSL_CTX. Closes #567.
Client library fixes:
- Fix incorrect PSK key being used if it had leading zeroes.
- Initialise "result" variable as soon as possible in
mosquitto_topic_matches_sub. Closes #654.
- No need to close socket again if setting non-blocking failed. Closes #649.
- Fix mosquitto_topic_matches_sub() not correctly matching foo/bar against
foo/+/#. Closes #670.
- SNI host support added.
Client features:
- Add -F to mosquitto_sub to allow the user to choose the output format.
- Add -U to mosquitto_sub for unsubscribing from topics.
- Add -c (clean session) to mosquitto_pub.
- Add --retained-only to mosquitto_sub to exit after receiving all retained
messages.
- Add -W to allow mosquitto_sub to stop processing incoming messages after a
timeout.
- Connections now default to using MQTT v3.1.1.
- Default to using port 8883 when using TLS.
- mosquitto_sub doesn't continue to keep connecting if CONNACK tells it the
connection was refused.
Client fixes:
- Correctly handle empty files with "mosquitto_pub -l". Closes #676.
Build:
- Add WITH_STRIP option (defaulting to "no") that when set to "yes" will strip
executables and shared libraries when installing.
- Add WITH_STATIC_LIBRARIES (defaulting to "no") that when set to "yes" will
build and install static versions of the client libraries.
- Don't run TLS-PSK tests if TLS-PSK disabled at compile time. Closes #636.
- Support for openssl versions 1.0.0 and 1.0.1 has been removed as these are
no longer supported by openssl.
Documentation:
- Replace mentions of deprecated 'c_rehash' with 'openssl rehash'.
1.4.15 - 20180228
=================
Security:
- Fix CVE-2017-7652. If a SIGHUP is sent to the broker when there are no more
file descriptors, then opening the configuration file will fail and security
settings will be set back to their default values.